Lawn-mower.



No. 802,869. v PATENTED OUT. 24, 1905. 0. LOMBERG & w. L. STEPHENS.

LAWN MOWER.

APPLICATION FILED JUNE 24. 1905.

2 SHEETS-SHBET 1.

Guam;

No. 802,869. PATENTED 001124;, 1905. G. LOMBERG dz W. L. STEPHENS.

LAWN MOWER.

APPLICATION FILED JUNE 24, 1005.

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5 wheels.

4 bottom or bed plate 3.

45 keys 7.

1U H l STATES PATN FFICE.

LAWN-"MOWER.

Specification of Letters Patent.

Patented Oct. 24, 1905.

Application filed June 24, 1905- Serial No. 266,733.

To all whom it may concern:

Be it known that we, CHARLES LOMBERG and WILLIAM L. STEPHENS, citizensof the United States of America, residing at Sharonhdl, 1n

the county of Delaware and State of Pennsylvania, have invented new anduseful Improvements in Lawn-Mowers, of which the following is aspecification.

This invention relates to improvements in [O lawn-mowers, the object ofthe invention being to provide a light-running mower which is simple ofconstruction, reliable and eflicient in use, and adapted to cut grass ofany length or height, and which embodies cutting mech- [5 anismcomprising a stationary cutting-blade and a reciprocating cutting-bladesickle, together with mechanism for operating the sickle which is easyin action and readily acccssible for repairs or the replacement ofdamaged or worn-out parts.

The preferred embodiment of the invention is illustrated in theaccompanying drawings, in which Figure 1 is a top plan view of theimproved lawn-mower, showing the pivoted casing open to expose theoscillating lever and connection for operating the sickle. Fig. 2 is acrosssection through the mower, taken on a line centrally through theaxes of the supporting- Fig. 3 is a central longitudinal section takenon the line 3 3 of Fig. 2, and Fig. 4: is a horizontal section taken onthe lined 4 of Fig. 3.

1n carrying our invention into practice we provide a supporting-framecomprising a pair of heads or disks 1 of suitable form and constructionto serve the purpose, and which are connected and braced at properpoints by cross bars or rods 2 and also by a transverse The disks 1 areprovided with outwardly-extending journals i for the usualsupporting-wheels 5, which are held upon the journals by caps 6, securedto the outer ends of the journals by cotter-pins or The bedplate 3 andjournals 4: are located a short distance in advance of the centralvertical line of the frame and support the front portion thereof, therear portion of the frame being supported by the usual transverse 5roller 8, said roller being journaled at its ends in bracket-plates 9,provided with slots 10, receiving screws or other suitable fasteningdevices 11, which adjustably secure the brackets Arranged upon the underside of the bedplate 3 is a stationary cutter-plate 12, which is fixedto the bed-plate by screws or other suitable fastenings 13, and isprovided with a comparatively Wide central slot 14; and narrowerguide-slots 15 on opposite sides of said central slot and openingthereinto at their inner ends. Arranged below the stationary cutterplate12 is a reciprocatory cutter plate or blade 16, which carries guidescrews or bolts 17, projecting upward through the slots 15 and adaptedto slide therein as the blade or sickle 16 reciprocates, the sicklebeing thereby guided in atrue path. Fixed to the sickle is a pivotbolt18, having its head bearing against the under side of the sickle-bladeand its shank projecting upwardly through the central slot 14-. in thestationary cutter-blade 12 and carrying a collar or sleeve 19, widenedat its upper end to project over upon the bedplate 3, said sleeve beingsecured in position by fastening and check nuts 20 and 21, thread edupon the upper end of the bolt-shank. Fulcrumed centrally on the bolt isan oscillating lever 22, having an enlarged or widened central bearingportion 23, pierced for the passage of the bolt and resting upon thehead or widened portion of the sleeve 19, which forms an effectivesupport therefor. The lever is detachably secured upon the bolt by thenut 21 and is connected at its outer ends by the eccentric or wrist pins24 to pinions 25, said pinions having portions of their peripheriesprojecting outwardly through slots 26 in the heads or disks 1 andmeshing with gear-rims 27, formed or applied upon the inner sides of thesupporting-wheels 5. The tread-surfaces of the supporting-wheels arepreferably corrugated or serrated to obtain a firm hold on theground-surface, and as the mower is propelled forwardly these wheelscommunicate motion through the gear-rims and pinions to the lever 22,which will be rocked or oscillated in a horizontal plane on the centralpivot-bolt and at the same time reciprocated longitudinally of thebed-plate 3, the bolt and parts traveling during such motion in the slot14 of the stationary cutterplate and communicating slot 3 in thebedplate and transmitting reciprocatory motion to the movable cutterplate or sickle 16. The

crank-pins 24 are respectively disposed at diametrically opposite sidesof the axes of the pinions 25, so as to operate in opposite directionsin unison to oscillate and reciprocate the lever, the construction beingsuch that the reciprocating sickle will be operated with a minimum-ofresistance, thus rendering the mower light-running. By the use of astationary and reciprocating cutter-plate, arranged as herein shown anddescribed, the mower is adapted to cut close to the groundsurface.

A semicircular cover or shield 28 is provided to inclose the lever,pinions, and cooperating parts of the actuating mechanism and to coverthe slots in the respective plates to prevent the access of dirt, dust,grass, and other foreign substances thereto. This cover or shield hasits front edge arranged to abut against the front edge of the bed-plateand is pivoted adjacent to said edge to the disks or heads 1, so that itmaybe closed down upon the bed-plate, as shown in full lines in Fig. 3,or thrown open in a forward direction to permit access to the workingparts. \Vhen thrown forward or open, the cover rests against the forwardcross-rod 2, by which it is supported in open position. A handle 29 isprovided for manipulating the mower. This handle is connected to a yokeformed of straps 30, pivotally connected at their free ends bypivot-pins 31 to the disks 1 adjacent to the rear cross bar or rod 2. Onone of the disks 1 a stop-pin 32 is provided, against which the pivotedend of the adjacent strap is adapted to bear to limit the upward andforward movement of the handle. The straps are provided in their loweredges with notches 33 to engage the rear cross-bar 2 to limit thedownward or lowered position of the handle.

From the foregoing description, taken in connection with theaccompanying drawings, the construction, mode of operation, andadvantages of the invention will, it is thought, be readily understoodwithout a further extended description.

Having thus described the invention, What is claimed as new is 1. In alawn-mower, the combination of a supporting-frame, ground wheels mountedthere0n,a stationary cutter-plate on the frame, a reciprocatorycutter-plate coacting therewith, an intermediately-fulcrumed oscillatingand reciprocatory lever for operating said reciprocatory cutter-plate,and means cooperating between the ground-wheels and ends of, the leverfor operating said lever from the ground-wheels.

2. In a lawn-mower, the combination of a supporting-frame, ground-wheelsmounted thereon and provided with gear members, a stationarycutter-plate on the frame, a reciprocatory cutter-plate coactingtherewith, a lever intermediately fulcrumed to said reciprocatorycutter-plate, pinions on the frame operated by the gear members on thewheels, and wrist or eccentric pins connecting said pinions with theends of the lever.

3. In a lawn-mower, the combination of a supporting-frame, ground wheelsmounted thereon and provided with gear members, a stationary cutterplatefixed to the bed-plate of the frame and formed with guide-slots, areciprocatory cutter blade provided with guide members slidable in saidslots, a pivotbolt carried by the reciprocatory blade, a lever fulcrumedintermediate] y to said bolt, and pinions provided with crank-pinsconnected with the ends of the lever, said pinions meshing with the gearmembers on the groundwheel.

4. In a lawn-mower, the combination of a supporting-frame provided witha slotted bedplate, a stationary cutter-plate carried by the bed-plate,a reciprocatory cutter-plate coacting with said stationary cutter-plate,a pivotbolt projecting through the slot in the bedplate and connected tothe reciprocatory cutter-plate, an oscillating and reciprocating leverintermediately pivoted to said bolt, ground-wheels mounted upon theframe, operating connections between said wheels and the ends of thelever, and a semicircular shield pivotally mounted to close down overthe bedplate, lever and operating connections and to be swung open toexpose the same, substantially as described.

In testimony whereof we affix our signatures in presence of twowitnesses.

CHAS. LOMBERG. M. L. STEPHENS. VVitn esses:

SARA G. Sworn, Jos. P. Sworn.

